Portable traveling saw and control means therefor



0. EISELE June 7, 1960 PORTABLE TRAVELING SAW AND CONTROL MEANS THEREFOR 2 Sheets-Sheet 1 Filed June 2, 1958 INVENTOR. 0220 file/2.2

June 7, 1960 Filed June 2, 1958 o. EISELE 2,939,497

PORTABLE TRAVELING SAW AND CONTROL MEANS THEREFOR 2 Sheets-Sheet 2 INVENTOR.

drab/2 iz'seZa BY saw during use.

United States Patent-Oi PORTABLE TRAVELING SAW AND CONTROL ,MEANS THEREFOR Orion Eisele, Aurora, 111.; Johanna Mae Carey, administratrix of said Orion Eisele, deceased Filed June 2, 1958, Ser. No. 739,360

' The invention relate s to improvements in traveling saws and. more a particularly to the novel construction and assembly ofa portable poweroperated saw apparatus.

connected with manual means, operable from one end of the frame, for moving the saw carriage along theguides. The manual means is operably connected with control means, in the form of a switch in the electrical circuitto the motor, for actuating said control means direction. The apparatus also includes novel means for clamping a sheet of material to be sawed in place beneath the frame and .a rewind coil for the electric cord to the motor so as to'avoid entanglement of the cord with the highly efiicient andsafe in operation.

only when the saw carriage is being advanced in one The apparatus is self-contained and. .1 may be carried from job to job and be set up on a It is therefore an object of the invention to provide a novelly constructed portable traveling saw.

frame for a traveling saw.

Another object is to provide a traveling power operated .sawassembly. that is easy to operate and wherein the operation. of the saw is effected only when the saw is. traveling in a cutting direction.

. Another obje'ctjs to provide a novelly constructed carria'ge for a-tra'veling saw. V

Another object isnto provide aportable electrically vdriven saw with a novel rewind forthe electrical cable. '-.An'other.object'i s to provide a portable power operated "traveling saw assembly-with a novelwork clamp. v

' With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel features of construction, arrangement and a combination of parts hereinafter fully described, illustrated in the accompanying drawings, and particularly pointed out inthe'appended claims, it being understood that; various changes in the form, proportion, size and minor details of the structure may be made without departing from thespin't, or sacrificingany .of the advantages, of the invention.

For the purpose of-facilita'ting an -understanding of the invention, there is'illustratedin the accompanying -drawings, apreferred embodiment'thereof, from an inspection of which, when considered in connection with the following description theinvention, its mode of con- -struetion, assembly and operation, and many, of ,its ad- .Another object is ,toprovide a novelly constructed 6? such asua sheetof' plywood or wallboard 37, the elonmounted on its driven shaft 26. so arranged that a segment of its perimeter overlies as "2,939,497 Patented June 7, 1960 2 ing saw assembly, showing it mounted on a supporting structure;

Fig. 2 is a back elevational view thereof;

Fig. 3 is an enlarged detail elevational view of the saw carriage assembly;

Fig. 4 is a transverse sectional view, taken substan tially on line 4-4 of Fig. 3; and,

, Fig. 5 is a fragmentary detail elevational view of the frame, illustrating the clamp bar assembly.

Referring to the accompanyingdrawings, the portable traveling saw assembly comprises an elongated frame including an upper frame portion 1 1 having downwardly extending end portions 12 to each of which is secured, as by welding, a base plate 13. A thin strap 14 is arranged parallel to and in substantial vertical alignment with and below the upper portion 11, which strap has its ends secured, as by welding, to the end p'ortions'12 above the base plates 13. Said strap has secured to its upper surface, and substantially coextensive therewith, a guide rail 15 that is substantially square in section. A companion guide rail 16 is arranged coextensive with the upper frame portion .11 and is connected thereto intermed-iate its ends by a web plate 17 and at its ends to the end portions 12.

A saw carriage 18, having an upper bearing bracket 19 fitted with anti-friction rollers 21, and a movable lower bearing bracket 22 fitted with anti-friction rollers 23, is mounted in the frame with the rollers in the respective bearing brackets 19-22 engaged with the guide rails 16 and 15 respectively, so as to be movable along substantially the entire length of the frame 11. This carriage 18 mounts an electric motor 2 4 having a circular saw 25 As shown, the saw is one side of the lower guide rail 15 and its mounting strap 14. Vertical adjustment of the saw carriage for varying the extent to which the periphery of the saw 25 projectsbelow the strap 14 is effected by adjustment of the lower bearing bracket 22 with respect to the saw carriage. i

As shown in Fig. 3, the lower bearing bracket 22 is pivotally'secured to the saw carriage at one of its ends,

as at 27, and its other end has an arcuate'wing 28 formed with spaced perforations 29 to selectively receive a bolt 30 for securing said "bearing bracket in a vertically adjusted position with respect to the saw carriage.- In

order toinsure that the lower bearing bracket 22 -is properly seated on the rail af'all times, with both of its rollers 23 in engagement with said rail, the upper bearing bracket 19 is pivotally connected, as atf31, to the saw carriage 18 to facilitate self-adjustment of the saw'carriage irrespective of the relative position of the, lower bearing bracket 22. I

- The saw carriage may include a hand-hold 32 which is hollow, at least in part, to receive mounted therein a normally open micro-switch 33 connected in the. electrical circuit to the motor 24. A lever 34, pivotally mounted at the bearing 27, has its free end operatively associated with-the spring detent 35 of the micro-switch for actuating the same. An arm 36, integral with or otherwise firmly secured to the lever 34, extends upwardly therefrom for a purpose to be explained presently.

As noted hereinabove, the saw carriage 18 is adapted to be moved longitudinally along the guides 15-16 during a cutting operation. In order to cut a piece of material,

gated frame is placed in an upright positionon amakeup support preferably comprised of at least two stringers 38, which may be 2 x' 4's, laid upon a pair of saw-horses or other supports 39. (3-clamps 41 engaged around the foot plates 13 and the related ends of the stringers 38 secure the frame firmly in place.

The "sheet 67, *to "be *cut, then inserted in the space between the top surface of the stringers 38 and the bottom face of the frame strap 14, with the line of the proposed cutin vertical alignment with the path of the'saw-blade 25. The sheet 3 :f7 is held against displacement by 'a clamp bar 42which isfsubstaiitially cbeitensive with and is spacedlaterallyfrbm one side of the 'guidera'il "15,

as best shown in Figs. 4 and 5. one arm fftlie 'clamp bar Q' is connectedtojthe fianieby alink 43 (Fig. -S) and its other end is connected to an arm @4, asat"45, which arm hasits' lower 'en'd pivo teid'to the frame at 46. The arm 44 is fin'ovable from the substantially vertical posit-ion show'n in Fig. il intq aim is held subarea ally jnthe inclined p o sition'show'n in Figf s'o astb EarryTthe ciamp bar "fl down tightly against the sliet "37 ior fil s .the' i n i meme 3, t 'p qaaii ia an r fth ircular aw is-plaefedin operation ma nified-wagi- "riidirially along the "'fifanie 'frorn {one' erid' of t'he 'slieet to the then This is accomplished by iri anual o'pe'rat-ion ndles's chain: 47 which flS trained "river a pair of 'spi o kets 418549; inounted crime-rotation one on each d theie ndfportions I'Z'of theframe The-l'owerreach hefchain47 isfixedly c'onnecte d 'tothe 'saw carriage asjat151 -fZ (Fig. 3), and rotationfof the sprock'ets is "efictedby"manual "operation of an eccentrichandle 53 (F pnih Sp &-

Refei ringspecifically to 'Fig. '3, the lower reach of 'thecliain "471isengaged with'theswitchlever arm 36. reult, when 'the 'sawcarriage 18 is moved to the llefitfas "wfed inlFig. 3, the initial pull "on the'lower 'ifeach'oflthe chain?! causes the sla'clc therein "to betaken fup j'and the'arm "36 is moved sufiiciently to depress the springfietent35"for{c1osing micr switch-SS to start the ffmotor. Whenithe advance of the' sawc'arriag'e 18is stoppedforany reason, 'or whenthe saw carriage is being urned toth'e starting endpf the frame, the "tension t "cha lclienjedflsuiiiciently 'toypermitthe swi h 33fto'open,thusfstopping motor ope'i'ation This genient insures utmost sa ety in tliefoperat ion of i be pseitjisidle at allitinieseigcepfwhen being dvanced t o'pe'rform acutting operation. I n order to prevententanglement of the electric supply 'c6r" i 54 to themotorfduring 'the'adva'nce and "retraction "jof'jthei s awfcarriage'fm along the framefsa-id cord is "'arri'ed o n'a'spring wounddrum' mounted within a casing :6nd9i"t 1;iranie? dw iqh efl fe x teiiding therefrom for eonfiection "with ht 1 1 2 iir yn a a i edth t the' inven'tionjits mode eff-commebly, an ima iyfo f itsffadvantages-sho ild y nder'st'oodj f fom'the-jforegoing without furrl pfiioniaud v hrin e w f t 3 t whl'ie A ferredlenibodirrieirt of the inyention has-been'sh'own 'a (1 described for illustrative'purposes; the'structurabdeta ls. are wn yer s saleab e. of w iva within fth'e' I urvi'ew "of the ini e'n'tion as defined"in"the*appended c aims. 7; What claimed'anddesiied'to scureby-IletteisPatent i"U fi t s. i, 1. In" a saw, the combination f an elongatedffriame, rtically"'aligned" upperand lower guide rails substanftiallv coeiiteiisiv'e with the length loff said frame, aksaw ca age',bearih gjb'racket s on saidfsaw carriage one guided ach rail for movement lohgitudinally'alongthe frame, fiWjiflEi' q m9unt n lan" l tr m 'ri a ar awblade connected to said motorjsaid blade having ,p e a ,r i lnp it di f isl i fi i etv 1 materialafratiged beneath the framefa pair ofsprociiets 4 one mounted at each end of the elongated frame, an endless chain trained over said sprockets, said chain having one reach thereof connected to said saw carriage, manually engageable means operable to rotate the 5 sprockets to move the saw carriage along the rails, a normally open switch for said motor carried by the saw carriage, and a lever on said saw carriage engageable bysa'id reach of the chain *and operable to close said switch when the saw-carriage is being advanced in a 10 direction to cut the material. I

2. in afsaw, the fcombination' oi'an"elorigated frame, upper and lower guide rails substantially coiltensive with the length *of said frame, a 's'aw carriage, anti-friction means guiding said carriage along said rails for movement longitudinally along'the "time, said saw carriage mounting an electric motor and a circular saw blade connected to said motor, means on said frame to support fitspaced above a'su'pporting' surface, said blade having a peripheral portion extending below said frame to cut inz'iterial "arranged "on said surfae beneath said frame, manual rfieans including an endless chain to advance the-saw carriage longitudinall'y*a1ong said rails, a norriially open switch' on saidsaW-"carriageoperable tostart "a d 's't'op the motor, "and a levr' carried by Y the 'saw carr3age ahd' o'p'erably' conne cting 'said chain with said-switch a'ctiiable when the saw carriageis'being advanced'ina di'rectidn T to but said material toclose the switch.

"3. Irr' asaw, the combination" of 3 an elongatedirame, rappe an lower guide r'ails" substantially coextensive with -'the ieng't -of sa'id frame, a-sa'w carriage zguided on 'said rails ier-movementlongitudinally along "the frame, said sawcairiage mounting "an electric-motor and a circular s w bl'ade" connected to *said 'mot'or, said blade having a {peripheral -poi-tibn extending below said 1 frame to -cut fiiaterialarranged beneath said frame, =means including 'an elialfiss bh dln to advance the saw' carriagelongitudiriallyalbiig'sa-id r'ails, a"norinally*open switch on saidsaw carriage operable to -"start and *stop the motor, and a lvr' cai'ried-bn said saw 'car'riag'e -operatively connected with said switch 'and engagab1e'-by"'=said -chain to "close "theswitch when the saw'-carriag"e is being advanced in a direction to out said material. 7 V

*4 n'-'a'="saw; the-combination of a framarguide-rails n aid 1 frame, asaw carriage guided' on saidrails for rriovn'int aldng the" frame; said saw carriage mounting an electric motor and a circular'*saw 'blade connected to "saidriiotor,-' said -blade ha'ving -'a peripheral portion extending below said frame tdcut material arranged beneath r hie, means to adjustsaid' sa'w carriage vertically, an n'd 'ss' chain' operable toadvance the saw carriage i "f irormally-"open'switch"on'= said"' saw operable *to "start an'd stop-"the-motor;and a leve'r 'oiiniedon tlie carriage" and operatively connected-with "sem and engageable by? said chain "to close the W wlin the saw carriage isbeirig advanced in a -direetidn to %ut Said material.

Referencs- Gited'in the me ofthis-patent 

